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Puch96's avatar
Puch96
Guide
Mar 30, 2021

Netgear CM2000 has blinking white downstream light

Hello.

I was wondering if anyone is experiencing an issue with Netgear CM2000 cable modem on Xfinity.

My downstream light will blink white.  I do not have any connection issues, but I notice the following on the logs:

 

TimePriorityDescription
Tue Mar 30 11:05:14 2021(Notice (6))CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxxx;CMTS-MAC=xxxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;
Tue Mar 30 11:04:41 2021(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;
Tue Mar 30 09:17:03 2021(Notice (6))CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;
Tue Mar 30 09:16:28 2021(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxx;CMTS-MAC=00:01:5c:71:9e:7c;CM-QOS=1.1;CM-VER=3.1;
Tue Mar 30 09:07:53 2021(Notice (6))CM-STATUS message sent. Event Type Code: 22; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;
Tue Mar 30 09:07:25 2021(Notice (6))CM-STATUS message sent. Event Type Code: 20; Chan ID: 37; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xxxxxxxxx;CMTS-MAC=xxxxxxxxx;CM-QOS=1.1;CM-VER=3.1;

 

 

Here is my channel info:

 

Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel507000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
 
Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM2565507000000 Hz-2.5 dBmV40.6 dB00
2LockedQAM2562489000000 Hz-2.0 dBmV40.7 dB00
3LockedQAM2563495000000 Hz-2.0 dBmV40.7 dB00
4LockedQAM2564501000000 Hz-2.1 dBmV40.7 dB00
5LockedQAM2566513000000 Hz-2.7 dBmV40.5 dB00
6LockedQAM2567519000000 Hz-2.9 dBmV40.4 dB00
7LockedQAM2568525000000 Hz-2.9 dBmV40.5 dB00
8LockedQAM2569531000000 Hz-2.9 dBmV40.5 dB00
9LockedQAM25610537000000 Hz-3.0 dBmV40.4 dB00
10LockedQAM25611543000000 Hz-3.1 dBmV40.4 dB00
11LockedQAM25612549000000 Hz-3.3 dBmV40.2 dB00
12LockedQAM25613555000000 Hz-3.4 dBmV40.2 dB00
13LockedQAM25614561000000 Hz-3.3 dBmV40.2 dB00
14LockedQAM25615567000000 Hz-3.4 dBmV40.0 dB00
15LockedQAM25616573000000 Hz-3.4 dBmV40.0 dB00
16LockedQAM25617579000000 Hz-3.6 dBmV40.0 dB00
17LockedQAM25618585000000 Hz-3.9 dBmV39.9 dB00
18LockedQAM25619591000000 Hz-4.0 dBmV39.8 dB00
19LockedQAM25620597000000 Hz-3.9 dBmV39.9 dB00
20LockedQAM25621603000000 Hz-3.9 dBmV39.9 dB00
21LockedQAM25622609000000 Hz-3.9 dBmV39.9 dB00
22LockedQAM25623615000000 Hz-3.8 dBmV39.9 dB00
23LockedQAM25624621000000 Hz-3.5 dBmV40.0 dB00
24LockedQAM25625627000000 Hz-3.2 dBmV40.2 dB00
25LockedQAM25626633000000 Hz-2.8 dBmV40.3 dB00
26LockedQAM25627639000000 Hz-2.9 dBmV40.1 dB00
27LockedQAM25628645000000 Hz-2.8 dBmV40.1 dB00
28LockedQAM25629651000000 Hz-2.9 dBmV40.2 dB00
29LockedQAM25630657000000 Hz-2.9 dBmV40.2 dB00
30LockedQAM25631663000000 Hz-3.0 dBmV40.1 dB00
31LockedQAM25632669000000 Hz-3.0 dBmV40.1 dB00
32Not LockedUnknown00 Hz0.0 dBmV0.0 dB00
 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA1512035600000 Hz48.0 dBmV
2LockedATDMA2512029200000 Hz46.8 dBmV
3LockedATDMA3512022800000 Hz46.8 dBmV
4LockedATDMA4512016400000 Hz45.8 dBmV
5LockedATDMA5256040400000 Hz47.3 dBmV
6Not LockedUnknown000 Hz0.0 dBmV
7Not LockedUnknown000 Hz0.0 dBmV
8Not LockedUnknown000 Hz0.0 dBmV
 
Downstream OFDM Channels
ChannelLock
Status		Modulation /
Profile ID		Channel
ID		FrequencyPowerSNR /
MER		Active Subcarrier
Number Range		Unerrored
Codewords		Correctable
Codewords		Uncorrectable
Codewords
1Locked0 ,1 ,2 ,337690000000 Hz-2.5 dBmV39.8 dB1228 ~ 28673546583143537724072
2Not Locked000 Hz0 dBmV0.0 dB0 ~ 4095000
 
Upstream OFDMA Channels
ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower
1Not Locked000 Hz0 dBmV
2Not Locked000 Hz0 dBmV

7 Replies

    • Puch96's avatar
      Puch96
      Guide
      Mar 30, 2021

      Oops.  Sorry. Did not notice forum for Orbi AX.  I re-posted on correct modem forum.

  • JackyShen's avatar
    JackyShen
    Aspirant
    Apr 07, 2021

    It seems the signal have a few noise but it will not effect too much because it come back quickly.

    The LED issue may the software issue. I guess....

     

    From D3.1 Spec

    Type 20: NCP profile failure.

    Type 22: NCP profile recovery.

  • Southxpaw's avatar
    Southxpaw
    Aspirant
    Jun 08, 2021
    Hi, I also bought a netgear cm2000. This is actually my 2nd one. My first modem worked for about A month and a half. One day it just shut off and never came back on and so I got it replaced. But on both modems, the downstream icon keeps blinking. It’s very annoying. Has there been a fix for it?
    • FURRYe38's avatar
      FURRYe38
      Guru - Experienced User
      Jun 08, 2021

      Please post a copy and paste of the modems connection status page.
      Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
      Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
      Be sure your using good quality RG6 coax cable up to the modem. 
      Be sure to power OFF the modem for 1 minute them back ON.
      https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853

      Southxpaw wrote:
      Hi, I also bought a netgear cm2000. This is actually my 2nd one. My first modem worked for about A month and a half. One day it just shut off and never came back on and so I got it replaced. But on both modems, the downstream icon keeps blinking. It’s very annoying. Has there been a fix for it?